brush off vs disuse

brush off

verb
  • Used other than figuratively or idiomatically: see brush, off. To remove something with a brush. 

  • To disregard (something), to dismiss or ignore (someone), as unimportant. 

disuse

verb
  • To cease the use of. 

noun
  • The state of not being used; neglect. 

How often have the words brush off and disuse occurred in a corpus of books? (source: Google Ngram Viewer )